Omega 320-1732, Sliding gear spring

OMEGA original part, NOS without factory packaging.

• Fits cal: 320, 321

Data: Omega 321 (base caliber: Lemania CH27 C12).

• 17 jewels, manual wind chronograph, 60 s, 30 min, 12 h counter.
• Size: 12''' 27 mm.
• H: = 6,74 mm.
• N: = 18000
• Power reserve: 44 h.

Versions:

• 320: 60s, 30 min counter, H=5,57 mm, (base: Lemania CH27).
• 321: 60s, 30 min, 12 h counter, (base: Lemania CH27 C12).